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HomeAircraftHelicopterMain Discussion › Futaba GV1 question: No throttle response with engine on
08-01-2018 04:38 PM  13 days agoPost 1
OneHoof

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Cold Spring, Kentucky

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I started my engine, on my large gasser, after checking to ensure all servos responded properly.

The throttle servo worked perfectly with the engine on.

But as soon as I started the engine, there was no throttle response at all.

Is it a setting in the GV1?

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08-01-2018 04:57 PM  13 days agoPost 2
RM3

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Killeen, Texas - USA

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possibly... sounds like the gov is active BUT the setting is zero... OR the ignition is messing with the servo, governor or both...

the question should be this:

Was it working before or at any time before this? did you make any changes?

showing a preference will only get you into trouble, 90% of everything is crap...

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08-01-2018 05:05 PM  13 days agoPost 3
OneHoof

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Cold Spring, Kentucky

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Yes. It worked perfectly on the previous flight.

But tail servo arm broke and I had to do a hovering auto.

I lost bind from pushing the button on the back of the transmitter and could not get Mikado VBar to bind despite following the instructions, to turn off and back on.

Eventually I plugged JR receiver into FBL unit as a satellite, created a binding plug, to finally get all the satellites to bind.

Perhaps now, the GV1 needs to be plugged into the JR receiver instead of the Mikado FBL Control unit?

But the JR receiver is plugged into a secondary satellite port, so I presumed the FBL unit would just look at the JR receiver as another satellite antenna.

Not sure?

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08-01-2018 05:07 PM  13 days agoPost 4
OneHoof

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Cold Spring, Kentucky

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I scrolled through the GV1 menu and there were things inhibited (INH).

I have never had a governor before and the GV1 is totally new to me.

I need to find a manual.

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08-01-2018 05:11 PM  13 days agoPost 5
OneHoof

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Cold Spring, Kentucky

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For a large gasser 830 mm blades, what should my settings look like in the GV1 menu?

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08-01-2018 05:12 PM  13 days agoPost 6
Mark Ryder

Administrator

Ann Arbor, Michigan

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OneHoof
I need to find a manual.
Try the following...
https://rc.runryder.com/rrTV-Photo/Futaba/GV1/

Mark Ryder

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08-01-2018 05:19 PM  13 days agoPost 7
TMoore

rrMaster

Cookeville, TN

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RR is a model heli repository of excellent information and how to's. Always has been.

Delayed Response Operator Not Engaged
AMA SECTION 336 = Good
Drones = EVIL

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08-01-2018 06:01 PM  13 days agoPost 8
OneHoof

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Cold Spring, Kentucky

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Thanks guys!

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08-01-2018 07:57 PM  12 days agoPost 9
RM3

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Killeen, Texas - USA

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OneHoof
For a large gasser 830 mm blades, what should my settings look like in the GV1 menu?
Raja (Rbort) has a very good setup procedure here on RR... for gassers there are two particular settings in the GV-1 that are critical to setup... the trick is that these settings are "hidden"... they are Low Limit Hover and Low Limit IdleUp if I recall... get these wrong and the RPMs due to throttle position will be too high despite what the RPM settings are and the engine will sound like it wants to die or over speed in mid collective when flying in idle up...

showing a preference will only get you into trouble, 90% of everything is crap...

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08-02-2018 05:36 AM  12 days agoPost 10
OneHoof

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Cold Spring, Kentucky

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Thanks!

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08-02-2018 05:40 AM  12 days agoPost 11
OneHoof

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Cold Spring, Kentucky

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I used a round about way to get the radio to bind to the Mikado VBar.

I took the original JR Receiver, which came with the heli (but not installed) and plugged it into the Mikado satellite port.

Therefore; I presume that the Mikado VBar looks at the JR Receiver as a satellite.

I have one satellite off the JR Receiver’s remaining satellite plug.

I created a binding plug from a Volt Watch plug in wire.

So, when I turned on the power, the JR Receiver and both satellite receivers were blinking.

I then pushed the button on the back of the radio transmitter and turned it on, and all the lights went solid, and it was bound!

I tested the controls and everything responds as it should.

But, upon my initial flight test attempt, the throttle servo stops working as soon as I crank the engine on.

Note: Even the satellite plugged into the Mikado flybarless system has a solid light too, indicating it is bound to the radio transmitter.

Now instead of just two satellite antennas, I have the extra antennas on the JR Receiver as well.

Does this seem okay to fly the flybarless system like this?

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08-02-2018 05:43 AM  12 days agoPost 12
OneHoof

rrApprentice

Cold Spring, Kentucky

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As I mentioned, the Mikado lost its bind with the radio, and despite following the instructions, it would not bind.

As a last resort, I plugged the JR Receiver into the secondary satellite port.

This was the only thing I changed, from the previous flights.

So, I am wondering if the GV1 disables the throttle because it now wants to be plugged into the receiver instead of the Mikado FBL unit?

Could this be what is throwing everything off?

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08-02-2018 11:10 AM  12 days agoPost 13
Rojoalfa

rrVeteran

Punta de Mata, Monagas-Venezuela

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/
/

RF interference...

Remember that RF interference depends on rpm...

Take the main blades off and check cables... No rolls, ...

/

Saludos cordiales,

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08-02-2018 02:12 PM  12 days agoPost 14
OneHoof

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Cold Spring, Kentucky

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But it was perfectly fine on the flight before.

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08-02-2018 02:25 PM  12 days agoPost 15
OneHoof

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Cold Spring, Kentucky

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Apparently plugging the JR receiver into the Mikado satellite port has changed something.

It is just weird that the everything works perfectly until I start the engine.

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08-02-2018 03:05 PM  12 days agoPost 16
RM3

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Killeen, Texas - USA

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What model helicopter is this? If your loosing function when the engine is running, but regain it after the engine stops and the RX system is still on, you have some sort of ground loop problem with the ignition system. Somewhere the ignition system may be back-feeding into the RX system.. not sure. This is when you start looking at insulation problems with the primary and secondary windings and the ignition or the HV plug wire.

You may need to start "jiggling" wires to find out where you may have a wiring fault... bad connectors, wire insulation cut and touching frame metal (or CF side frames)... anything. And if you do this while its idling and you get a shock... you got problems.

showing a preference will only get you into trouble, 90% of everything is crap...

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08-03-2018 04:07 AM  11 days agoPost 17
OneHoof

rrApprentice

Cold Spring, Kentucky

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The Airstar Mongoose, with Zenoah 270.

I noticed a nick in the wire coming out of the engine.

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08-03-2018 04:04 PM  11 days agoPost 18
RM3

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Killeen, Texas - USA

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if that nick in the ignition wire touches or comes close enough to the Carbon Fiber side frames (yes they do conduct electricity) or any of the metal parts... its going to cause all sorts of strange electrical control issues.

also as stated many times already RF interference is a big problem with gassers... too many aspiring gasser heli pilots often make the mistake of mounting sensitive RX components near the HV plug wire... all low voltage systems (including the RX battery) must be placed as far away as practical from the HV plug wire... AND NEVER run along side of it nor even crossing near it. A bad HV lead can radiate enough RF noise to shut down a receivers ability to pick up on any TX signals and sometime force it to go into safe mode (if you have that setup... and you should)

Lastly a bad or dirty spark plug will cause issues as well... a plug boot that is not all the way onto the spark plug... the wrong plug (non resistor type)... a lot to look at when dealing with gassers that Nitro and electrics never come across.

Just for Sh!ts and giggles you should try removing the GV-1 from the heli... program a gentle throttle curve into the TX and see if it runs... if it does somethings wrong with the GV-1 or the way its programmed...

showing a preference will only get you into trouble, 90% of everything is crap...

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08-03-2018 08:49 PM  10 days agoPost 19
OneHoof

rrApprentice

Cold Spring, Kentucky

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Thanks RM3.

I have the one satellite antenna right next to the GV1 coming out of the engine, where the nick is!

I will move it to the opposite side.

The nicked wire isn’t touching anything.

Would electrical tape be a good fix.

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08-03-2018 09:32 PM  10 days agoPost 20
RM3

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Killeen, Texas - USA

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OneHoof
Would electrical tape be a good fix.
as long as the metal sheath underneath is not all messed up and frayed, yeah a few layers of good 3M electrical should be fine.... I would definitely move that antenna away from that whole section of the heli... the stator gator as well.

showing a preference will only get you into trouble, 90% of everything is crap...

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HomeAircraftHelicopterMain Discussion › Futaba GV1 question: No throttle response with engine on
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